Bella Flooring Plus

Pictures explains everything, Hardwood is not professionally installed, gap is getting more and more visible in family room and living room, what can I do, I asked them to fix it, wood filler is all they can do, Please keep it as reference, I do not want anymore hard working family to waste their blood money on something they cannot enjoy and get bothered everyday by seeing it, I didn’t hire them through homestars I walked it
Maybe store owner is concerned about their business but their staff don’t care,